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Message from discussion Addressable power-strip safety thought
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Peter Sci Turpin  
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 More options Sep 25 2012, 12:17 pm
From: "Peter \"Sci\" Turpin" <s...@sci-fi-fox.com>
Date: Tue, 25 Sep 2012 17:17:41 +0100
Local: Tues, Sep 25 2012 12:17 pm
Subject: Re: [london-hack-space] Re: Addressable power-strip safety thought
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The idea is that it would enable any tool to be tied into the
access-control system. Each socket on the strip can be remotely turned
on or off apparently.

As I understand it the idea is to ensure people using mains powered
tools are actually trained in using them. So use your access card to
turn on a tool, if you're trained the plug it's connected to will come
on. Only works though if the tool can't simply be moved to another
active socket.
I doubt it'll go on every single tool, probably just the more
specialised ones.

Hmm, though it does raise the point of how to turn it off again. Timed?
Must be deactivated by initial user or loose tool privilege?

On 25/09/2012 16:28, Adrian Godwin wrote:

> If the power plug is captive, that would leave a bare wire when the
> workshop's turned back on. Nobody will be patient enough to wait for a
> keyholder to remove the cord, they'll tape it up at best.

> Not really sure what problem this is solving. Why should the leads be captive ?

> -adrian

> On Tue, Sep 25, 2012 at 4:24 PM, Monty <monty...@gmail.com> wrote:
>> Step 1) Kill the power to all workshop or entire strip (it's an catastrophic
>> emergency afterall)
>> Step 2) Cut the power cord of the tool in question.
>> Step 3) Leave a note.

>> On Tuesday, 25 September 2012 16:13:46 UTC+1, Sci wrote:

>>> I mentioned the idea on Saturday night that perhaps caging-in these
>>> strips (a box to contain plugs but with wire-access slots and a padlock)
>>> would be the simplest way of stopping people from bypassing the socket
>>> allocations, rather than soldering tools in permanently.

>>> Something that's occurred to me is the issue of tool failure. If a tool
>>> fails catastrophically (bursts into flames, say), or someone gets a
>>> serious shock then the power needs to be disabled instantly.

>>> Each addressable power strip is going to need it's own emergency-off
>>> button. Seems the only way to make them safe and still limit a tool to a
>>> particular power socket. Fumbling for an access card to shut it off via
>>> RFID would take too long in such circumstances.


 
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